never enough comments
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update.php
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update.php
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<?php
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/**
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*
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* update.php - automatic system update
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*
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* Automatically update database schemas and any other development changes such that
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* copying the latest files from the source code repository will always perform a clean
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* and painless upgrade.
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*
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* Each function in this file is named update_nnnn() where nnnn is an increasing number
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* which began counting at 1000.
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*
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* At the top of the file "boot.php" is a define for BUILD_ID. Any time there is a change
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* to the database schema or one which requires an upgrade path from the existing application,
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* the BUILD_ID is incremented.
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*
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* The current BUILD_ID is stored in the config area of the database. If the application starts up
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* and BUILD_ID is greater than the last stored build number, we will process every update function
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* in order from the currently stored value to the new BUILD_ID. This is expected to bring the system
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* up to current without requiring re-installation or manual intervention.
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*
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* Once the upgrade functions have completed, the current BUILD_ID is stored as the current value.
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* The BUILD_ID will always be one greater than the last numbered script in this file.
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*
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* If you change the database schema, the following are required:
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* 1. Update the file database.sql to match the new schema.
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* 2. Update this file by adding a new function at the end with the number of the current BUILD_ID.
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* This function should modify the current database schema and perform any other steps necessary
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* to ensure that upgrade is silent and free from requiring interaction.
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* 3. Increment the BUILD_ID in boot.php
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* 4. TEST the upgrade prior to checkin and filing a pull request.
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*
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*/
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function update_1000() {
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q("ALTER TABLE `item` DROP `like`, DROP `dislike` ");
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